Pongchitsiri S. “Prevalence and Predicting Factors of Depression Among Elderly in Primary Care Unit, Chachoengsao Province”. Journal of The Department of Medical Services 43, no. 5 (October 1, 2018): 81–86. Accessed April 26, 2024. https://he02.tci-thaijo.org/index.php/JDMS/article/view/247780.